Finding the Fourth Proportional to 2,706.21, 4,056.72 and 1,319.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,706.21 : 4,056.72 = 1,319.83 : x
2. Step 2: Convert to fraction form
   2,706.21/4,056.72 = 1,319.83/x
3. Step 3: Cross multiply
   2,706.21x = 4,056.72 × 1,319.83
4. Step 4: Simplify right side
   2,706.21x = 5,354,165.67
5. Step 5: Solve for x
   x = 5,354,165.67/2,706.21
6. Step 6: Final answer
   x = 1,978.47